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Nylon gets stuck at end of print

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Posted · Nylon gets stuck at end of print



I have a weird bug occurring when printing with dual extrusion.


I will describe the circumstances:

I'm printing parts combined out of Ultimaker Nylon (Print Core 1) and Ultimaker TPU 95A (Print Core 2).

The parts come out nicely, but when the print is finished, the Nylon always gets stuck in the print core. The core even gets pulled back into the print head. Then the wizard for stuck material appears.

When i follow the instructions, print core 1 gets heated up again and clicks back down hard when the Nylon is hot enough. (It seems to be free at this point)

I still have to remove the bowden tube and cut the material to finish the wizard. Then it gets unloaded.

As if that wasn't enough, after finishing the process, the print bed violently falls down without much resistance from the Z-steppers.


Long story short: I think the printers workflow when unloading the material has a bug. After printing the last layer with TPU, print core 1 doesn't heat up again and therefore fails to unload the Nylon properly.


I would appreciate some help - maybe i'm doing something wrong. If not, maybe this could be looked over for future bug fixes.


Thanks in advance. 

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